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Oil Tanker Emissions & Retrofit Radar

Ships ranked by AER (Annual Efficiency Ratio) — grams of CO₂ emitted per tonne of deadweight carried one nautical mile (g CO₂/dwt·nm), the IMO carbon-intensity metric behind the CII rating — from official EU MRV emissions data for reporting year 2025. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2025)
#514 of 1,651 oil tankers
CO₂ intensity
3.3 g CO₂/dwt·nm
vs segment average (5.18)
-37% greener
B
Bulk Carrier Container Ship Oil Tanker Chemical Tanker Gas Carrier LNG Carrier General Cargo Vehicle Carrier Refrigerated Cargo Ro-Ro Cargo

CII band distribution

551 at D/E
A 411B 556C 557D 354E 197

2,075 rated vessels · 279 of the D/E set dock within 12 months

Docking pipeline — D/E vessels per quarter

53
Q4
60
'27 Q1
57
'27 Q2
37
'27 Q3
45
'27 Q4
71
'28 Q1
43
'28 Q2
34
'28 Q3

Windows estimated from the class-expiry docking model, not bookings.

Top eligible retrofit measures for this segment

MeasureEligible CO₂ reductionCapex band PaybackConfidence
Propeller redesign / replacement 1,874 5–10% €400k–1,200k — vendor claim
Bulbous bow reprofiling 1,757 2–6% €300k–900k — vendor claim
Turbocharger cut-out 1,371 1–3% €80k–250k — vendor claim
Methanol dual-fuel conversion 1,195 5–15% €8,000k–20,000k — vendor claim
Rotor sails (per unit) 1,185 route-dependent €1,500k–3,500k — vendor claim
Suction wing sails (per unit) 1,185 route-dependent €1,000k–2,500k — vendor claim

Capex bands are indicative vendor/literature priors. Payback appears once price parameters are configured.

Retrofit opportunity in this segment

411
D/E vessels with at least one eligible measure
€1,668–3,970M
capex range, top measure per vessel (411 of 411 with computable scaling)
0.26–0.49 Mt
annual CO₂ reduction available (vendor-claimed ranges × reported emissions)

Retrofit prospects — worst band first

VesselBand Age Drop year
PAULA GLORY · 25-60k E 3y 2026
OLYMPIC TROPHY · >200k E 16y 2026
SEALING · 25-60k E 23y 2026
EOS T · <25k E 20y 2026
HERCULES SUN · <25k E 4y 2026
See all 2,075 rated oil tankers with exposure and dock windows. Sign in →
Sort 🌱 Greenest first 🔧 Least efficient first — retrofit candidates
Size (DWT)
All sizes < 25,000 DWT 25k – 60k DWT 60k – 100k DWT 100k – 200k DWT > 200,000 DWT
Year
2025 2024
1,685
vessels ranked
1.32
greenest (g CO₂/dwt·nm)
4.01
segment median
# Vessel Size (DWT) Built Carbon intensity — AER (g CO₂/dwt·nm) Grade
501 STAVANGER TS
IMO 9737395
 113,004 2017
3.3
B
500 ALMI EXPLORER
IMO 9579547
 157,787 2013
3.3
B
503 PEGASUS STAR
IMO 9891672
 116,120 2021
3.3
B
511 ATLANTIC EMERALD
IMO 9892975
 109,201 2022
3.3
B
510 ANDROMEDA
IMO 9943061
 114,811 2023
3.3
B
509 BEIJING SPIRIT
IMO 9418597
 156,493 2010
3.3
B
508 EBN HAWKEL
IMO 9874507
 112,003 2021
3.3
B
507 DILIGENT WARRIOR
IMO 9750050
 149,995 2016
3.3
B
506 TORM HELENE
IMO 9904871
 115,575 2021
3.3
B
505 VST OCEANIA
IMO 9740469
 109,985 2017
3.3
B
513 ADEBOLA ADELINE
IMO 9427627
 156,813 2009
3.3
B
512 FRONT CAPELLA
IMO 9790995
 111,000 2015
3.3
B
504 SOLA TS
IMO 9724350
 112,939 2017
3.3
B
515 GHAT
IMO 9930105
 115,519 2022
3.3
B
517 SEA TURTLE
IMO 9886718
 114,085 2021
3.3
B
514 HUMBLE WARRIOR
IMO 9856361
 149,990 2020
3.3
B
520 BERKELEY SQUARE
IMO 1027914
 113,903 2025
3.3
B
519 NOUNOU
IMO 9960980
 115,322 2023
3.3
B
518 SFL TUCANA
IMO 9978327
 109,895 2024
3.3
B
516 ADVANTAGE SPICE
IMO 9419888
 156,657 2010
3.3
B
521 CRYSTAL
IMO 9956020
 113,385 2024
3.3
B
523 ABLIANI
IMO 9693068
 109,999 2015
3.3
B
522 ACHILLEAS
IMO 9458494
 157,883 2010
3.3
B
526 SEA STAR
IMO 9945289
 109,999 2023
3.3
B
525 CAPTAIN PARIS
IMO 9692844
 113,876 2014
3.3
B
527 IONIC ANAX
IMO 9802152
 114,720 2017
3.3
B
524 LYRIC MAGNOLIA
IMO 9734408
 109,999 2016
3.3
B
528 BELGRAVE SQUARE
IMO 1027926
 113,804 2025
3.3
B
529 HANOVER SQUARE
IMO 9783992
 114,366 2019
3.3
B
530 RESILIENT WARRIOR
IMO 9856359
 149,990 2020
3.3
B
533 BOSSA NOVA SPIRIT
IMO 9637703
 154,199 2013
3.3
B
532 DELTA POSEIDON
IMO 9468671
 157,380 2011
3.3
B
531 HENRIQUE DIAS
IMO 9453834
 157,055 2007
3.3
B
534 SIGRUN
IMO 9612052
 156,092 2013
3.3
B
535 LIPARI
IMO 9529487
 158,237 2012
3.3
B
536 RYMAN
IMO 9777931
 113,000 2017
3.3
B
537 AIFANOURIOS
IMO 9891696
 116,015 2021
3.3
B
542 ROBOLA
IMO 1021790
 113,613 2023
3.3
B
541 SEMAKAU SPIRIT
IMO 9833723
 115,643 2019
3.3
B
540 SEA PANTHER
IMO 9802164
 114,723 2018
3.3
B
539 TORM HANNAH
IMO 9712864
 109,999 2016
3.3
B
538 EAGLE BRASILIA
IMO 9795062
 113,400 2019
3.3
B
546 FRONT CHEETAH
IMO 9686637
 109,900 2013
3.3
B
545 DELTA MED
IMO 9412309
 161,653 2010
3.3
B
544 MARLIN LAGOS
IMO 9823584
 114,853 2022
3.3
B
543 SEA GARNET
IMO 9772943
 158,454 2017
3.3
B
549 SFL TAURUS
IMO 9978339
 109,895 2024
3.3
B
548 ORCHID SPIRIT
IMO 9901867
 112,750 2021
3.3
B
547 JARNAIN
IMO 9823546
 114,831 2021
3.3
B
550 NEWBURY
IMO 9920497
 112,095 2022
3.4
B
Page 11 of 34 — 1,651 vessels
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Engine intelligence

Which engines power the greenest fleets?

The main engine is the single largest CO₂ source on board — typically well over 80% of a ship's emissions come from propulsion. We aggregated this ranking the other way around: every engine design is scored by the measured carbon intensity of the vessels carrying it, licensee-built units merged under their design brand. The verdict from the 2025 data — modern dual-fuel designs like MAN B&W's ME-GI and WinGD's X-DF families, together with EGR/SCR-abated and ultra-long-stroke G-type engines, consistently power the most emission-friendly ships in service.

Emission-friendly engine ranking

AER (Annual Efficiency Ratio) = annual CO₂ emissions ÷ (deadweight × distance sailed), the IMO carbon-intensity metric used for CII ratings. It is built only from measured CO₂, distance and deadweight — not the self-reported cargo transport-work figure, which is unreliable. Implausible outliers (top 2% per segment) are excluded. Grade A–E reflects each vessel's rank within its segment. Source: EMSA THETIS-MRV.